/*
* Copyright (c) 2002-2010 LWJGL Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* * Neither the name of 'LWJGL' nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.lwjgl.opencl;
import org.lwjgl.LWJGLUtil;
import org.lwjgl.PointerBuffer;
import java.nio.ByteBuffer;
import static org.lwjgl.opencl.CL10.*;
/**
* Base implementation of information utility classes.
*
* @author Spasi
*/
abstract class InfoUtilAbstract<T extends CLObject> implements InfoUtil<T> {
protected InfoUtilAbstract() {
}
protected abstract int getInfo(T object, int param_name, ByteBuffer param_value, PointerBuffer param_value_size_ret);
// Optional
protected int getInfoSizeArraySize(final T object, final int param_name) {
throw new UnsupportedOperationException();
}
protected PointerBuffer getSizesBuffer(final T object, final int param_name) {
final int size = getInfoSizeArraySize(object, param_name);
final PointerBuffer buffer = APIUtil.getBufferPointer(size);
buffer.limit(size);
getInfo(object, param_name, buffer.getBuffer(), null);
return buffer;
}
public int getInfoInt(final T object, final int param_name) {
object.checkValid();
final ByteBuffer buffer = APIUtil.getBufferByte(4);
getInfo(object, param_name, buffer, null);
return buffer.getInt(0);
}
public long getInfoSize(final T object, final int param_name) {
object.checkValid();
final PointerBuffer buffer = APIUtil.getBufferPointer();
getInfo(object, param_name, buffer.getBuffer(), null);
return buffer.get(0);
}
public long[] getInfoSizeArray(final T object, final int param_name) {
object.checkValid();
final int size = getInfoSizeArraySize(object, param_name);
final PointerBuffer buffer = APIUtil.getBufferPointer(size);
getInfo(object, param_name, buffer.getBuffer(), null);
final long[] array = new long[size];
for ( int i = 0; i < size; i++ )
array[i] = buffer.get(i);
return array;
}
public long getInfoLong(final T object, final int param_name) {
object.checkValid();
final ByteBuffer buffer = APIUtil.getBufferByte(8);
getInfo(object, param_name, buffer, null);
return buffer.getLong(0);
}
public String getInfoString(final T object, final int param_name) {
object.checkValid();
final int bytes = getSizeRet(object, param_name);
if ( bytes <= 1 )
return null;
final ByteBuffer buffer = APIUtil.getBufferByte(bytes);
getInfo(object, param_name, buffer, null);
buffer.limit(bytes - 1); // Exclude null-termination
return APIUtil.getString(buffer);
}
protected final int getSizeRet(final T object, final int param_name) {
final PointerBuffer bytes = APIUtil.getBufferPointer();
final int errcode = getInfo(object, param_name, null, bytes);
if ( errcode != CL_SUCCESS )
throw new IllegalArgumentException("Invalid parameter specified: " + LWJGLUtil.toHexString(param_name));
return (int)bytes.get(0);
}
}